Tube-expander.



No. 787,269. PATBNTBD APR.11, 1905. J. M. BROWN. TUBE BXPANDER.

APPLICATION FILED JULY 19. 1904. fig. 1

| i l l l INVEFSTOR /7 fla/mu *Kliff* UNiTeD STATES PATENT Patented April 11, 1905.

Ormes..

JAMES HON OIC BROM'N, OF MANSFIELI), OHIO, ASSIGNOR TO rIIIIC AUL'I- MAX & '.I`.-\ YLOR MACHINERY COMPANY, OF MANSFIICLI), OHIO, A COR- IOhA'lION OF OHIO.

SPECIFICATION forming part of Letters Patent No. '787.269, dated April 11, 1905.

Application filed July 19. 1904. Serial No. 217.168.

le it known that I, Janus )[oNuon Biiowx, of Mansfield. in the county of hichland and State of Ohio. have invented a new and useful rl`uhe-l lxpander, of which the following a cage-body and is provided with arc-shaped full. clear, and exact description, reference being' had to the accompanying drawings, foi'iiiing part of this specification, in whichA Figure l is a sectional side elevation showing niy expander in position. Fig. is a perspective view of the rollers with the cage indicated in dotted lines` and Fig. 3 is a crossseetiou ou the line III Ill of Fig. l looking toward the left.

My invention relates to the class of tubeexpanders, and is designed to provide a tool of v conjunction with the shorter rollers (3, acts to 65 this character hy which the tube can be expanded against the tube-seat and at the saine tune its outer end exterior to the tube-plate can be swelled or forced outwardly to lix the tube in position.

In the drawings, in which .I show a preferred forni of niy invention, 2 represents a cylindrical cage of steel, preferably having' its The walls of i and disk 5 are together of about the saine length as the roller 4f. preferably foriiied with a curved or oval edge, as shown that is, its diameter is greater at the center than at its ends. rl`his avoids a shearing action upon the tube at the edge of the tube-plate. lhese rollers inay be secured in the cage against endwise displacement by the cap-plate T. secured by cap-boltsS, screwed into the cage-body between its recesses.

Around the threaded portion 3 I. secure the split nut or internally-threaded sleeve 9. '.Ihis

The i'ollei' or disk 5 is l niay be niade in two parts held by a ring 10, having' a pin l1. which slips in through a 50 groove l2 into an annular gi'oove I3, cut in the halves of the split sleeve. 'l `he front Yface of this sleeve lits against the back end of the flanges Il, Yfoi-ined one half on each half of the nut and extendingaround the rear portion of the cage-body.

In using' the expander the tiihe l5 is slipped within the circular seat in the tube-plate lo, the expander is inserted, a talier-niaiidrel IT is forced in through the central hole in the expander, and the expander is revolved in the usual inaiiner, while the niandrel is forced in. During' this operation the longer rollei' +L, in

expand the tube against the tube-seat. At the saine tiine the disks 5, being' of slightlylarger diainetcr than the rollers l and 6, act to force. out the end portion IS of the tube, as shown in Fig. 1, thus lixing the tube in 7O place. During this action the single long i'ollei' prevents the foi'ination of a ridge on the tube between the rollers and (5, which would lfoi'ni if three sets of siinilar character wei'e used. By causing the longer roller to 75 operate across the abutting line of the roller and disk I prevent the ci'acking or cutting of the tube at this point against the outer edge of the tube-seat. 'lhe disks being' independent are forced out to give the end flare with- SO out expanding the tube against the tube-seat with any greater pressure than in the ordinary practice of expanding, this being aided by the curved or inclined faces of the disks.

rIheadvantages of niy invention result fi'oiii 85 the siinultaneous forcing of the tube against its seat and flaring' its outer end beyond thel tube-plate, also froni the use of the longer i'ollei', which prevents any ridge formation, and from the, quickness and ease of operation and the preventing of in iury to the tube.

'lhe use of the independent short rollers or disks 5 allows the rollers lf to be Yforced out independently of theui without affecting the tiaring action of these disks. The incline or curve on the disk gives a proper flaring action Without forcing the tube against the seat so hard as to give a/shearing action. The filare is preferably made about one-fourth inch from the tube-seat.

The number of rollers may be varied, as Well as the cage structure, the shape and size of the rollers, and other variations may be made Without departing from my invention.

I claiml. A tube-expander having a cage, a pair of rollers in the cage abutting end to end, one of them being' arranged to extend Within the tube-seat and the other to flare the tubeend outwardly, and another longer roller also supported in said cage and operating across the abutting line of said first rollers; substantially as described.

2. A tube-expander having a pair of rollers or disks in endwise alinernent and lying together, one of them being longer than the other, and another longer roller supported at another point in the circle of the tube-expander and operating across the abutting line of said first rollers; substantially as described.

3. A tube-expander having a short roller, and a disk with a rounded or oval edge fitting together in endwise alinement, and another longer cylindrical roller supported in the cage at another point around the circumference and operating across the abutting line of said my hand.

JAMES MONROE BROVN. l/Vitnesses:

E. B. KALLMERTER, J. E. BROWN. 

